河北平原土壤硒异常成因及其生态效应

河北平原多目标区域地球化学调查在唐山开滦煤田及石家庄-邯郸一带发现了以Se元素为主的土壤地球化学异常。本文利用相关分析、多元统计分析等地球化学方法,对土壤Se异常成因、来源、生态环境效应等问题进行解释与评价。结果表明,燃煤产生的大气降尘是形成土壤Se异常的主要原因。土壤Se异常区小麦、玉米中Se元素含量明显高于非异常区,且有害元素含量不超标。

The Origin and Ecological Effects of Selenium Abnormity in Soil in Hebei Plain

Soil geochemical abnormities dominated by Se located in the area of the Kailuan coal field of Tangshan and Shijiazhuang-Handan,were detected in the multi-purpose regional geochemistry survey in Hebei Plain.In this paper,the origin of abnormal Se levels in soils was investigated and ecological environment effects were estimated using the geochemical methods,such as correlation analysis and multi-analysis.The results indicated that the atmospheric dust derived from coal combustion was the main reason for the occurrence of Se abnormities in the soil.The contents of Se in wheat and maize were higher in the abnormal field than those in the non-abnormity field.Moreover,the contents of deleterious elements were not exceedable.